Leviticus 4:26; Leviticus 4:31

26 He shall burn all the fat on the altar as he burned the fat of the fellowship offering. In this way the priest will make atonement for the leader’s sin, and he will be forgiven.

31 They shall remove all the fat, just as the fat is removed from the fellowship offering, and the priest shall burn it on the altar as an aroma pleasing to the LORD. In this way the priest will make atonement for them, and they will be forgiven.